/Engine/Plugins/Runtime/MassEntity/Source/MassEntity/Public/MassEntityManager.h
Copies values from FragmentInstanceList over to Entity's fragment. Caller is responsible for ensuring that the given entity does have given fragments. Failing this assumption will cause a check-fail.
void SetEntityFragmentsValues ( [FMassEntityHandle](API\Plugins\MassEntity\FMassEntityHandle) Entity, [TArrayView](API\Runtime\Core\Containers\TArrayView)< const [FInstancedStruct](API\Plugins\StructUtils\FInstancedStruct) > FragmentInstanceList )